[REGRESSION 4.4.x] Please cherry-pick 8fbcfeb8a9cc for 4.4.x

[REGRESSION 4.4.x] Please cherry-pick 8fbcfeb8a9cc for 4.4.x

[Takashi Iwai]

Hi Greg,

could you cherry-pick the commit

8fbcfeb8a9cc803464d6c166e7991913711c612c
   mac80211_hwsim: Replace bogus hrtimer clockid

for 4.4.x stable?  The current 4.4.x triggers BUG_ON() just by loading
mac80211_hwsim module.  See openSUSE bug#1047651 for details:
  https://bugzilla.opensuse.org/show_bug.cgi?id=1047651


The BUG_ON() itself comes from 4.4.21 stable updates, introduced by
the commit 4fc2942b6e2d:
    hrtimer: Catch illegal clockids
    [ Upstream commit 9006a01829a50cfd6bbd4980910ed46e895e93d7 ]

But in the upstream, this commit was reverted once by commit
82e88ff1ea94, then later on, revived (but with WARN() instead of
BUG_ON()) by the commit 336a9cde10d6.  So, we should also follow that
on 4.4.x, too.


I haven't followed the situation on other stable trees.  Thomas or
Marc should have a better grasp on them, so I leave to them :)


thanks,

Takashi

Re: [REGRESSION 4.4.x] Please cherry-pick 8fbcfeb8a9cc for 4.4.x

[Greg Kroah-Hartman]

On Fri, Jul 07, 2017 at 02:30:32PM +0200, Takashi Iwai wrote:
> Hi Greg,
> 
> could you cherry-pick the commit
> 
> 8fbcfeb8a9cc803464d6c166e7991913711c612c
>    mac80211_hwsim: Replace bogus hrtimer clockid
> 
> for 4.4.x stable?  The current 4.4.x triggers BUG_ON() just by loading
> mac80211_hwsim module.  See openSUSE bug#1047651 for details:
>   https://bugzilla.opensuse.org/show_bug.cgi?id=1047651
> 
> 
> The BUG_ON() itself comes from 4.4.21 stable updates, introduced by
> the commit 4fc2942b6e2d:
>     hrtimer: Catch illegal clockids
>     [ Upstream commit 9006a01829a50cfd6bbd4980910ed46e895e93d7 ]
> 
> But in the upstream, this commit was reverted once by commit
> 82e88ff1ea94, then later on, revived (but with WARN() instead of
> BUG_ON()) by the commit 336a9cde10d6.  So, we should also follow that
> on 4.4.x, too.
> 
> 
> I haven't followed the situation on other stable trees.  Thomas or
> Marc should have a better grasp on them, so I leave to them :)

I think this should go into 4.9 as well, so I've put it there too.

thanks,

greg k-h